Now Alfred began a long series of skirmishes -- and within a month the Danes had surrendered.

这时，阿尔弗雷德发起一连串小规模的进攻，结果不出一个月，丹麦人就投降了。

We endeavour to avoid the old, romantic idea of a gusher, which wastes oil and gas.

我们尽量避免使用陈旧天真的喷井方法，那样会浪费石油和天然气。

The currents of air that the walls of the ship direct upwards, as well as in the line of its course, are enough to give the great bird with its immense wings sufficient sustenance and progress.

沿船体的上升的气流和沿航线向前的气流给这种巨翼大鸟以足够的浮力和推力。

and since most medical men in the Health Services are overworked and have little time for offering time-consuming and little-appreciated advice on such subjects as diet,

因为卫生部门的大多数医生都超负荷工作，所以没有多少时间提出一些既费时而又不受人欢迎的忠告，如注意饮食、

is an unfortunate victim of adverse circumstances,

是逆境的牺牲品，

When several elephants are being trained at one time,

几只象同时训练时，